Definition of: overhead

(ō′vər·hed′) adjective
1. Placed or working above or aloft: an overhead railway; working from above; working downward: an overhead valve.
2. Chosen by random sampling; average: an overhead sample.
3. Situated or working overhead; also, passing over the head.
4. Denoting such general expenditure in a financial or industrial enterprise as cannot be attributed to any one department or product, excluding cost of materials, labor, and selling; fixed charges; in transportation, bond interest and other expenses previous to operating expenses, taxes, etc.
—noun
1. General expenditure applicable to all departments of a business, as light, heat, taxes, etc.
2. Naut. Ceiling of a cabin or hold.
—adverb (ō′vər·hed′)
1. Above one's head; aloft.
2. So as to be submerged; over one's head.